Analytical Description and FE-Simulation of the Tube Inverse Pressing

Abstract The tube inversion is a forming operation, which is able to produce double walled tubes. The tube is axialy pressed into a radiused die and starts curling. At a certain point the curling stops without an external intervention and the tube begins to invert building a second wall. First a review of some previous experimental and theoretical works is done and then the changing from the curling to the inversion is investigated analytically. At the end some FE-calculations are described.